We obviously cant access the production database ourselves so how would we go about doing this? Our current working theory is to:
1. add the appsetting to disable the UTC check and request a deploy2. Ask managed services to run the script3. request another deploy where the appsetting is removed
This would cause minimal downtime and no stacktrace.
But it would be nice to have some sort of information about best DXC procedure for this in the SDK article about the UTC conversion.
Also, why have you not added an option to do this conversion automatically as part of the site startup sequence, just like other database modifications?
Please, contact Managed Services to do the conversion. They will provide you with all information and steps you need to take.